How to delete older calendar items across all Exchange 2010 mailboxes

I have about 300 mailboxes in a single database using Exchange 2010 SP1.  I'd like to setup a new retention policy that deletes appointments and meetings older than two years from all Exchange mailboxes.  Reoccurring appointments/meetings can be left alone if they are still current.

I see 15 different tag type options when setting up a new Retention Policy Tag, but I don't see "Calendar" as one of the options.

Is it still possible to delete calendar entries using a retention policy or some other mechanism?  Manually running a Powershell command from time to time would be fine too.
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curt2000Asked:
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MichaelVHConnect With a Mentor Commented:
John,

seems to be my bad. In exchange 2010 there is indeed no option to select Calendar in the GUI.
According to the technet website you should run the new-retentionpolicytag cmdlet in order to set that for Calendar Items:

http://technet.microsoft.com/en-us/library/dd335226.aspx

Sorry about the confusion!
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MichaelVHCommented:
Normally, you should be able to select the "Calendar" folder when setting up a Retention Policy.

Grts,

Michael
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curt2000Author Commented:
Yeah, I don't have "Calendar" as an option.  Here's what I do have:

All other folders in the mailbox
Contacts
Conversation History
Delete Items
Drafts
Inbox
Journal
Junk E-Mail
Notes
Outbox
Personal Folder
Recoverable items Folder
RSS Feeds
Sent Items
Sync Issues

Thanks,
John
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curt2000Author Commented:
Thanks very much!  However, on that page it says " Retention tags for the Calendar and Tasks folders are not supported."

You did answer my question in that I now know this can't be done in Exchange natively.  I'll have to look at other ways of doing this, maybe through Outlook.

Thanks for chiming in!
John
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